Bosch Professional Music Source Music-Player


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The PRM-UST is a professional multi-source music player intended to be used as background music source for public address and commercial audio applications. It has USB interface, SD card input for playing stored music files, and tuner for FM frequency band broadcast receiver. It is used in hotels, shops, supermarkets, restaurants, bars, canteens, gyms, showrooms, and other places where background music creates the right atmosphere.


With an SD/USB memory capacity of up to 32 GB (up to 8000 tracks) and the option to connect the USB either on the front or rear panel, the digital player provides hours of high-quality, uninterrupted music playback from a single source. It supports music organized on a SD card or USB device in multiple folders. The player will automatically search and play all supported files on a flash memory device. It can play MP3 files with bit-rates from 32 kbps to 320 kbps, mono / stereo, and both constant bit-rates (CBR) and variable bit-rate (VBR) are supported. 


The digitally controlled FM tuner can accurately capture the radio stations and has presets memory to store favorite radio stations. 


The media player (SD or USB) and the tuner can operate simultaneously on different outputs. The level of the outputs can be set with the volume control buttons on the front panel or the remote. There is a combined output which has priority for media player, it automatically switches over to the FM tuner when there is no active media player input.

Technical specifications


Mains power supply
Voltage range 110 — 120 VAC +/-10%, 50 — 60 Hz
220 — 240 VAC +/-10%, 50 — 60 Hz
Power supply fuse 0.63 A / 250 V
Power consumption (W) 15 W
FM Tuner
FM frequency range 87.5 — 108 MHz
Frequency response 50 Hz — 12 kHz +/-3 dB
Channel separation (1 kHz)  >25 dB
Signal-to-noise ratio >50 dB
FM input sensitivity 26 dBu
Antenna impedance 75 ohm
Audio output level 1.5 V rms +/-1 dB @10 kO
USB or SD source
Frequency response (Hz) 50 Hz — 18 kHz +/-1 dB
Signal-to-noise ratio (1kHz) >75 dB
Total harmonic distortion (1 kHz)   <0.5%
Channel separation (1 kHz) >70 dB
Audio output level 1.5 V rms +/-1 dB at 10 kO
USB output current limit 500 mA max. (front and rear USB ports together)  
Memory card capacity (GB) 32 GB maximum
Supported file structure FAT, FAT32 and exFAT
Supported audio files mp3, wma, wav, flac, ape, m4a


Dimension (H x W x D) (mm) (with brackets) 44 mm x 482 mm x 250 mm
Dimension (H x W x D) (in) (with brackets) 1.73 in x 18.98 in x 9.84 in
Dimensions (H x W x D) (mm) (without brackets)  44 mm x 430 mm x 250 mm
Dimensions (H x W x D) (in) (without brackets)1.73 in. x 16.93 in x 9.84 in.
MountingStand-alone, 19" rack (19" wide, 1 U high)  
Color in RALRAL 9017 Traffic black
Weight (kg) (unit) 3.20 kg
Remote control dimensions
(L x W x D) (mm) (remote control)
130 mm x 44 mm x 20 mm
Weight (g)
(remote control without batteries) 
32 g


Operating temperature (C)0 C – 45 C
Storage temperature (C)-40 C – 70 C  
Operating relative humidity, noncondensing (%)   <90%